The explanation for why B is wrong is not satisfactory. The conclusion in the stimulus refers to the nerve in question, being the nerve in the back. However, question B refers to a nerve in the leg. If you negate B, and the cortisone actually relieved inflammation in the nerve in the leg, then you wreck the conclusion since the cortisone did not actually work on the nerve "in question". #help

@ Regarding the use of your excel spreadsheet, did you start filling out a spreadsheet while going through the LG section of the syllabus too? Or did you start using an excel spreadsheet once you finished the syllabus and started practicing?